Cook's Note: You can substitute 1 1/2 pounds ground chicken for the sirloin, brisket and short rib mix.For the coleslaw: Mix together the vinegar, mayonnaise, mustard, sugar, Worcestershire, salt, garlic, jalapenos, cabbage and onions. Set aside or refrigerate to let the flavors meld, preferably for 1 hour.
For the burgers: Preheat the grill to high heat. Mix together the brisket, short rib and sirloin
to combine well and form into 4 equal patties. Sprinkle both sides of
the patties with salt. Grill the patties over high heat until
medium-rare, 3 to 5 minutes per side.
Divide the pastrami
into 4 small piles. Warm the pastrami piles in a saute pan over medium
heat. After 2 minutes, top each pile with a slice of Swiss cheese. When
the cheese has melted, remove the pastrami from the pan and set aside.
Brush the cut sides of the buns with the butter and toast, cut-side down, in a pan or on the grill.
To
serve, place a burger on the bottom bun, top with the pastrami with
cheese, a heaping spoonful of the slaw, and finish with the top bun.